US20070180990A1 - Dynamic halogenation of sorbents for the removal of mercury from flue gases - Google Patents
Dynamic halogenation of sorbents for the removal of mercury from flue gases Download PDFInfo
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- US20070180990A1 US20070180990A1 US10/591,856 US59185605A US2007180990A1 US 20070180990 A1 US20070180990 A1 US 20070180990A1 US 59185605 A US59185605 A US 59185605A US 2007180990 A1 US2007180990 A1 US 2007180990A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
- B01D53/10—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/502—Hydrochloric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
Definitions
- the so-called particulate-phase mercury is really vapor-phase mercury adsorbed onto the surface of ash or carbon particles. Due to the high volatility of mercury and many of its compounds, most of the mercury found in flue gases is vapor-phase mercury.
- Vapor-phase mercury can appear as elemental mercury (elemental, metallic mercury vapor) or as oxidized mercury (vapor-phase species of various compounds of mercury).
- Speciation which refers to the form of mercury present, is a key parameter in the development and design of mercury control strategies. All efforts to devise new control strategies for mercury emissions from power plants must focus on this characteristic of mercury.
- Particulate collectors in use at electric utility plants most commonly electrostatic precipitators (ESP) or fabric filters (FF), sometimes called baghouses, provide high-efficiency removal of particulate-bound mercury.
- Fabric filters tend to exhibit better particulate-bound mercury removal than ESPs by providing a filter cake upon which to trap the particulate mercury as the flue gas passes through said filter cake. If the filter cake also contains constituents that will react with mercury such as unreacted carbon or even activated carbon, then the filter cake can act as a site to facilitate gas-solid reactions between the gaseous mercury and the solid carbon particles.
- FGD Flue Gas Desulfurization System
- SDA spray dryer absorbers
- Oxidized mercury typically appearing in the form of mercuric chloride, is soluble in water, making it amenable to removal in sulfur dioxide scrubbers. Elemental mercury, insoluble in water, is less likely to be scrubbed in conventional scrubbers. Removal of elemental mercury, therefore, remains an important issue in the search for cost-effective mercury control techniques.
- FIG. 1 (Source: Senior, C. L. Behavior of Mercury in Air Pollution Control Devices on Coal-Fired Utility Boilers, 2001) illustrates the relationship between coal chlorine content and vapor-phase mercury speciation. An important reason for the significant scatter in the data of FIG.
- mercury oxidation depends in part on the specific characteristics of the boiler as well as the fuel.
- the mercury oxidation reactions proceed by both homogeneous and heterogeneous reaction mechanisms.
- Factors such as boiler convection pass and combustion air preheater temperature profiles, flue gas composition, fly ash characteristics and composition, and the presence of unburned carbon have all been shown to affect the conversion of elemental mercury to oxidized mercury species.
- elemental mercury can be adsorbed onto the surface of activated carbon, the capacity is very limited and reversible. That is, the mercury is bonded to the carbon is a simple adsorption scheme and will eventually evolve off the surface of the carbon to be re-emitted to the gas phase. If the mercury is to be permanently captured by the carbon, it must be converted (oxidized) on the surface. It has been observed that the reactivity of conventional PAC with elemental mercury vapor is dependent upon the presence of certain acid gas species (e.g., hydrogen chloride and sulfur trioxide) in the flue gas stream. The presence of hydrogen chloride (HCl), in particular, has been shown to significantly improve the adsorption of elemental mercury from coal combustion flue gases.
- acid gas species e.g., hydrogen chloride and sulfur trioxide
- the hydrogen chloride is apparently adsorbed onto the carbon surface, facilitating the subsequent oxidation of elemental mercury on the surface of the carbon. This phenomenon is of great practical importance for the application of PAC injection for mercury control for plants firing subbituminous and lignite coals. These coals tend to have very low chlorine content, and therefore produce combustion gases containing only small amounts of hydrogen chloride, and therefore would benefit significantly by the addition of hydrogen chloride in judicious ways.
- a sulfur dioxide scrubber such as a wet or SDA (“dry”) flue gas desulfurization system.
- the scrubber removes acid gases such as hydrogen chloride in addition to the removal of sulfur dioxide.
- SDA wet or SDA
- the concentration of hydrogen chloride in the flue gases resulting from the combustion of these coals is low. This concentration is further reduced by absorption in the SDA system. This renders the PAC largely ineffective for elemental mercury capture in the SDA and fabric filter.
- PAC must therefore be injected sufficiently far upstream of the SDA to allow for the capture of mercury prior to the removal of the acid gases in the SDA. This significantly limits the effective residence time available for mercury removal, and necessitates the use of high carbon injection rates.
- Felsvang et al. (U.S. Pat. No. 5,435,980) teaches that the mercury removal of a coal-fired system employing an SDA system can be enhanced by increasing the chlorine-containing species (e.g., hydrogen chloride) in the flue gases.
- Felsvang et al. further teaches that this can be accomplished through the addition of a chlorine-containing agent to the combustion zone of the boiler, or through the injection of hydrochloric acid (HCl) vapor into the flue gases upstream of the SDA.
- HCl hydrochloric acid
- One aspect of the present invention is drawn to an inexpensive, yet effective method for increasing the concentration of hydrogen chloride, or other halogen-containing compounds, on the surface of the carbonaceous sorbent as the sorbent is conveyed to the injection location.
- Another aspect of the present invention is drawn to the use of bromine-containing compounds (which the present inventors have determined through experimental testing are significantly more effective than chlorine-containing compounds) to enhance the capture of elemental mercury by carbonaceous sorbents.
- Yet another aspect of the present invention is drawn to a method of mercury removal that is applicable to virtually all coal-fired utility power plants, including those equipped with wet or dry FGD systems, as well as those plants equipped only with particulate collectors.
- FIG. 1 is a graph illustrating the relationship between coal mercury content and mercury speciation for U.S. coals
- FIG. 2 is a schematic illustration of a first embodiment of the present invention; i.e., the Dynamic HalogenationTM process for treating sorbents for the removal of mercury from flue gases;
- FIG. 3 is a graph illustrating mercury removal achieved through the use of the Dynamic Halogenation process for treating sorbents according to the present invention across a system comprised of spray dryer absorber (SDA) and fabric filter (FF);
- SDA spray dryer absorber
- FF fabric filter
- FIG. 4 is a schematic illustration of a coal-fired electric utility plant configuration comprising a boiler and a downstream particulate collector;
- FIG. 5 is a schematic illustration of a coal-fired electric utility plant configuration comprising a boiler and a downstream spray dryer absorber (SDA) and particulate collector; and
- FIG. 6 is schematic illustration of a coal-fired electric utility plant configuration comprising a boiler and a downstream particulate collector and a wet flue gas desulfurization (FGD) system.
- FGD wet flue gas desulfurization
- FIG. 2 there is illustrated a preferred embodiment of the present invention, the Dynamic Halogenation process for treating sorbents for the removal of mercury from flue gases. As shown in FIG.
- a system and method according to the present invention comprises a conventional powdered activated carbon (PAC) injection system 10 including a sorbent storage tank 12 containing a supply of sorbent 14 , a means for metering 16 the sorbent 14 into a sorbent transport air stream 18 , a sorbent transport air blower 20 for supplying the air 18 used to convey the sorbent 14 to the injection locations in the flue gas flue(s), and a pick-up point 22 where the sorbent 14 is dispersed into the transport air stream 18 .
- PAC powdered activated carbon
- a halogen-containing reagent or compound 24 which may be in gaseous form, is injected into the flowing transport air/sorbent stream at a point 26 close to the point 22 where the sorbent 14 and transport air 18 first mix together.
- the adsorption of the halogen-containing reagent 24 onto the sorbent particles 14 occurs during the transport of this gas-solid mixture to the point of injection 28 in a dynamic process.
- the rate of adsorption of halogen during this transport is relatively high because of the locally high concentration of halogen in the transport line.
- the present invention is advantageous to the approaches of the prior art.
- the removal of elemental mercury from coal combustion gases generated by electric utility plants through the application of a conventional PAC injection process is very expensive.
- the present invention promises to significantly reduce the cost of mercury removal at coal-fired electric plants.
- the process provides the benefits, in terms of reactivity with elemental mercury, of replacing an expensive, pretreated PAC sorbent (e.g., iodine-impregnated PAC) with a conventional, low-cost sorbent.
- an expensive, pretreated PAC sorbent e.g., iodine-impregnated PAC
- the present invention is an improvement over Felsvang et al. (U.S. Pat. No. 5,435,980) because the present invention makes much more efficient use of the halogen-containing reagent 24 by placing it onto the carbon sorbent 14 surface just prior to injection into the flue gases.
- the sorbent does not have to compete with the alkaline fly ash or SDA lime slurry for the available halogen gas. It has been found by the inventors, and by several other investigators, that the addition of hydrogen chloride gas to the flue gases separately of the PAC injection system, as taught by Felsvang et al., does not significantly improve the elemental mercury removal performance of the PAC injection process.
- the present invention permits much lower addition rates for the halogen-containing reagent 24 relative to other methods for halogen addition.
- the present invention also has a significant advantage over other means of adding halogen-containing compounds 24 to the flue gases in that the boiler and other power plant components are not subjected to the corrosive nature of the halogen compounds. This is especially true when compared to the addition of halogens to the boiler combustion chamber. High-temperature corrosion of boiler components by chlorides is a well-known and serious concern.
- the present invention was tested in a 5 million Btu/hr Small Boiler Simulator (SBS) Facility.
- SBS Small Boiler Simulator
- the SBS was fired at approximately 4.3 million Btu/hr with a western U.S. subbituminous coal.
- flue gases exiting the SBS boiler first passed through a spray dryer absorber (SDA) for removal of sulfur dioxide, and then through a fabric filter (FF) for removal of fly ash and spent sorbent from the SDA system.
- SDA spray dryer absorber
- FF fabric filter
- FIG. 3 illustrates the removal of mercury across the SDA/FF system during operation of the Dynamic Halogenation process with HBr.
- halogen gas required to affect this improvement is on the order of a thousand times less than what would be required by direct injection of halogen gas directly into the flue or SDA.
- the halogen-containing reagent 24 is either hydrogen bromide or bromine (Br 2 ), and the carbonaceous sorbent 14 and halogen-containing reagent 24 are brought together in the sorbent pneumatic transport line with sufficient residence time for the halogen-containing reagent 24 to be adsorbed onto the carbonaceous sorbent 14 particle before the sorbent 14 is injected into the coal combustion flue gas stream. Based upon the testing conducted, it is estimated that a residence time of about 0.5 to about 1.0 second was achieved.
- the coal-fired boiler fuel may include bituminous, subbituminous, and lignite coals and blends, thereof.
- the present invention is not limited to applications where coal is being combusted. It may also be applied to any type of combustion process where mercury emissions are to be controlled, such as in connection with combustion processes involving the combustion of municipal solid waste in incineration plants.
- the bromine-containing reagent 24 could comprise hydrogen bromide gas (HBr) or bromine (Br 2 ).
- the halogen-containing gases 24 may include any one or more of the following: hydrogen chloride, chlorine (Cl 2 ), as well as compounds of fluorine and iodine, and halide derivatives thereof.
- the carbonaceous sorbents 14 may include, but are not limited to, powdered activated carbon (PAC), carbons and chars produced from coal and other organic materials, and unburned carbon produced by the combustion process itself.
- PAC powdered activated carbon
- the electric utility plant configurations may include plants equipped with only a particulate collector (FF or ESP) ( FIG. 4 ); an SDA FGD and a particulate collector (FF or ESP) ( FIG. 5 ); or a particulate collector (FF or ESP) and a wet FGD ( FIG. 6 ).
- FF or ESP particulate collector
- FIG. 4 the electric utility plant configurations may include plants equipped with only a particulate collector (FF or ESP) ( FIG. 4 ); an SDA FGD and a particulate collector (FF or ESP) ( FIG. 5 ); or a particulate collector (FF or ESP) and a wet FGD ( FIG. 6 ).
- the spent carbonaceous sorbent can be removed separately from the coal fly ash, if desired, by adding an additional particulate collector designed specifically to capture the injected quantity of carbonaceous sorbent.
- the present invention takes advantage of the ability to dynamically halogenate the carbonaceous sorbent 14 on site, at the coal-fired utility plant, as needed, thus avoiding any elaborate off-site manufacturing processes.
- Conventional pneumatic transport equipment can be used, and the mixing of the stream of halogen containing reagent 24 and the stream of carbonaceous sorbent 14 can take place at typical ambient conditions for such equipment at a power plant site; e.g. from about 0 C. to about 50 C.
- the specific injection locations 28 where the combined stream of halogen reagent and carbonaceous sorbent may be injected into the mercury-containing flue gas various locations will suffice.
- One such location could be into the flue gas stream just downstream (with respect to a direction of flue gas flow through the installation) of the air heaters conventionally used on such power plants, i.e., at location 28 A as illustrated in FIGS. 4, 5 and 6 , where the flue gas temperature is typically about 150 C., but the flue gas temperature at such location 28 A could be up to about 175 C. or as low as about 120 C.
- Another such location could be into the flue gas stream at a location 28 B as illustrated in FIG. 5 , which is just upstream of the particulate collector devices (FF or ESP), but downstream of the SDA apparatus.
- FF or ESP particulate collector devices
- the present invention may be applied to new fossil-fueled boiler construction which requires removal of mercury from flue gases produced thereby, or to the replacement, repair or modification of existing fossil-fueled boiler installations.
- the present invention may also be applied, as described earlier, to new incinerators for the combustion of MSW, or to the replacement, repair or modification of existing incinerators.
- certain features of the invention may sometimes be used to advantage without a corresponding use of the other features. Accordingly, there are other alternative embodiments which would be apparent to those skilled in the art and based on the teachings of the present invention, and which are intended to be included within the scope and equivalents of the following claims of this invention.
Abstract
Description
- Emissions Standards, as articulated in The Clean Air Act Amendments of 1990 as established by the U.S. Environmental Protection Agency (EPA), required assessment of hazardous air pollutants from utility power plants. In December 2000 the EPA announced their intention to regulate mercury emissions from coal-fired utility boilers. Coal-fired utility boilers are a known major source of anthropogenic mercury emissions in the United States. Elemental mercury and many of its compounds are volatile and will therefore leave the boiler as trace constituents in boiler flue gases. Some of these mercury constituents are insoluble in water, which renders them difficult to capture in conventional wet and dry scrubbers. Thus new methods and processes are needed to capture these trace constituents from boiler flue gases.
- Mercury appears in coal combustion flue gases in both solid and gas phases (particulate-bound mercury and vapor-phase mercury, respectively). The so-called particulate-phase mercury is really vapor-phase mercury adsorbed onto the surface of ash or carbon particles. Due to the high volatility of mercury and many of its compounds, most of the mercury found in flue gases is vapor-phase mercury. Vapor-phase mercury can appear as elemental mercury (elemental, metallic mercury vapor) or as oxidized mercury (vapor-phase species of various compounds of mercury). Speciation, which refers to the form of mercury present, is a key parameter in the development and design of mercury control strategies. All efforts to devise new control strategies for mercury emissions from power plants must focus on this characteristic of mercury.
- Particulate collectors in use at electric utility plants, most commonly electrostatic precipitators (ESP) or fabric filters (FF), sometimes called baghouses, provide high-efficiency removal of particulate-bound mercury. Fabric filters tend to exhibit better particulate-bound mercury removal than ESPs by providing a filter cake upon which to trap the particulate mercury as the flue gas passes through said filter cake. If the filter cake also contains constituents that will react with mercury such as unreacted carbon or even activated carbon, then the filter cake can act as a site to facilitate gas-solid reactions between the gaseous mercury and the solid carbon particles. If a power plant is equipped with a Flue Gas Desulfurization System (FGD) then either wet scrubbers or spray dryer absorbers (SDA) can remove significant amounts of oxidized mercury. Oxidized mercury, typically appearing in the form of mercuric chloride, is soluble in water, making it amenable to removal in sulfur dioxide scrubbers. Elemental mercury, insoluble in water, is less likely to be scrubbed in conventional scrubbers. Removal of elemental mercury, therefore, remains an important issue in the search for cost-effective mercury control techniques.
- Numerous studies have been, and continue to be, conducted to develop cost-effective approaches to the control of elemental mercury. Many of the studies have focused on the injection of a carbonaceous sorbent (e.g., powdered activated carbon, or PAC) into the flue gas upstream of the particulate collector to adsorb vapor-phase mercury. The sorbent, and its burden of adsorbed mercury, are subsequently removed from the flue gases in a downstream particulate collector. Adsorption is a technique that has often been successfully applied for the separation and removal of trace quantities of undesirable components. PAC injection is used, commercially, to remove mercury from municipal waste combustor exhaust gases. PAC injection removes both oxidized and elemental mercury species, although removal efficiencies are higher for the oxidized form. Although this approach appeared attractive in early work, the economics of high injection rates can be prohibitive when applied to coal-fired utility plants. More refined studies are now in progress to define more precisely what can and cannot be achieved with PAC. Still other studies seek to enhance PAC technology. One technique subjects the PAC to an impregnation process wherein elements such as iodine or sulfur are incorporated into the carbonaceous sorbent. Such processes can yield sorbents that more strongly bond with adsorbed mercury species, but also result in significantly higher sorbent cost.
- The speciation of vapor-phase mercury depends on coal type. Eastern U.S. bituminous coals tend to produce a higher percentage of oxidized mercury than do western subbituminous and lignite coals. Western coals have low chloride content compared to typical eastern bituminous coals. It has been recognized for several years that a loose empirical relationship holds between the chloride content of coal and the extent to which mercury appears in the oxidized form.
FIG. 1 (Source: Senior, C. L. Behavior of Mercury in Air Pollution Control Devices on Coal-Fired Utility Boilers, 2001) illustrates the relationship between coal chlorine content and vapor-phase mercury speciation. An important reason for the significant scatter in the data ofFIG. 1 is that mercury oxidation depends in part on the specific characteristics of the boiler as well as the fuel. The mercury oxidation reactions proceed by both homogeneous and heterogeneous reaction mechanisms. Factors such as boiler convection pass and combustion air preheater temperature profiles, flue gas composition, fly ash characteristics and composition, and the presence of unburned carbon have all been shown to affect the conversion of elemental mercury to oxidized mercury species. - Although elemental mercury can be adsorbed onto the surface of activated carbon, the capacity is very limited and reversible. That is, the mercury is bonded to the carbon is a simple adsorption scheme and will eventually evolve off the surface of the carbon to be re-emitted to the gas phase. If the mercury is to be permanently captured by the carbon, it must be converted (oxidized) on the surface. It has been observed that the reactivity of conventional PAC with elemental mercury vapor is dependent upon the presence of certain acid gas species (e.g., hydrogen chloride and sulfur trioxide) in the flue gas stream. The presence of hydrogen chloride (HCl), in particular, has been shown to significantly improve the adsorption of elemental mercury from coal combustion flue gases. The hydrogen chloride is apparently adsorbed onto the carbon surface, facilitating the subsequent oxidation of elemental mercury on the surface of the carbon. This phenomenon is of great practical importance for the application of PAC injection for mercury control for plants firing subbituminous and lignite coals. These coals tend to have very low chlorine content, and therefore produce combustion gases containing only small amounts of hydrogen chloride, and therefore would benefit significantly by the addition of hydrogen chloride in judicious ways.
- The dearth of halogen-containing gases can be further exacerbated if the PAC injection process is operating downstream of a sulfur dioxide scrubber, such as a wet or SDA (“dry”) flue gas desulfurization system. The scrubber removes acid gases such as hydrogen chloride in addition to the removal of sulfur dioxide. As an example, consider the application of PAC injection to a unit equipped with SDA and a fabric filter that fires a low-chlorine coal. The concentration of hydrogen chloride in the flue gases resulting from the combustion of these coals is low. This concentration is further reduced by absorption in the SDA system. This renders the PAC largely ineffective for elemental mercury capture in the SDA and fabric filter. PAC must therefore be injected sufficiently far upstream of the SDA to allow for the capture of mercury prior to the removal of the acid gases in the SDA. This significantly limits the effective residence time available for mercury removal, and necessitates the use of high carbon injection rates.
- Felsvang et al. (U.S. Pat. No. 5,435,980) teaches that the mercury removal of a coal-fired system employing an SDA system can be enhanced by increasing the chlorine-containing species (e.g., hydrogen chloride) in the flue gases. Felsvang et al. further teaches that this can be accomplished through the addition of a chlorine-containing agent to the combustion zone of the boiler, or through the injection of hydrochloric acid (HCl) vapor into the flue gases upstream of the SDA. These techniques are claimed to improve the mercury removal performance of PAC when used in conjunction with an SDA system.
- One aspect of the present invention is drawn to an inexpensive, yet effective method for increasing the concentration of hydrogen chloride, or other halogen-containing compounds, on the surface of the carbonaceous sorbent as the sorbent is conveyed to the injection location.
- Another aspect of the present invention is drawn to the use of bromine-containing compounds (which the present inventors have determined through experimental testing are significantly more effective than chlorine-containing compounds) to enhance the capture of elemental mercury by carbonaceous sorbents.
- Yet another aspect of the present invention is drawn to a method of mercury removal that is applicable to virtually all coal-fired utility power plants, including those equipped with wet or dry FGD systems, as well as those plants equipped only with particulate collectors.
- The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the present invention, its operating advantages and the specific benefits attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
-
FIG. 1 is a graph illustrating the relationship between coal mercury content and mercury speciation for U.S. coals; -
FIG. 2 is a schematic illustration of a first embodiment of the present invention; i.e., the Dynamic Halogenation™ process for treating sorbents for the removal of mercury from flue gases; -
FIG. 3 is a graph illustrating mercury removal achieved through the use of the Dynamic Halogenation process for treating sorbents according to the present invention across a system comprised of spray dryer absorber (SDA) and fabric filter (FF); -
FIG. 4 is a schematic illustration of a coal-fired electric utility plant configuration comprising a boiler and a downstream particulate collector; -
FIG. 5 is a schematic illustration of a coal-fired electric utility plant configuration comprising a boiler and a downstream spray dryer absorber (SDA) and particulate collector; and -
FIG. 6 is schematic illustration of a coal-fired electric utility plant configuration comprising a boiler and a downstream particulate collector and a wet flue gas desulfurization (FGD) system. - Referring to the drawings generally, wherein like numerals designate the same or functionally similar elements throughout the several drawings, and to
FIG. 2 in particular, there is illustrated a preferred embodiment of the present invention, the Dynamic Halogenation process for treating sorbents for the removal of mercury from flue gases. As shown inFIG. 2 , a system and method according to the present invention comprises a conventional powdered activated carbon (PAC)injection system 10 including asorbent storage tank 12 containing a supply ofsorbent 14, a means formetering 16 thesorbent 14 into a sorbenttransport air stream 18, a sorbenttransport air blower 20 for supplying theair 18 used to convey thesorbent 14 to the injection locations in the flue gas flue(s), and a pick-uppoint 22 where thesorbent 14 is dispersed into thetransport air stream 18. It should be recognized that this is only one embodiment of a pneumatic transport conveying system, and many other configurations could be used or developed by one of ordinary skill in the art without departing from the scope of the present invention. The key aspect of the present invention is that a halogen-containing reagent orcompound 24, which may be in gaseous form, is injected into the flowing transport air/sorbent stream at apoint 26 close to thepoint 22 where thesorbent 14 andtransport air 18 first mix together. The adsorption of the halogen-containingreagent 24 onto thesorbent particles 14 occurs during the transport of this gas-solid mixture to the point ofinjection 28 in a dynamic process. The rate of adsorption of halogen during this transport is relatively high because of the locally high concentration of halogen in the transport line. Once the sorbent enters the flue or SDA the rate of desorption of halogen from the surface of the carbon is too slow compared to the residence time for reaction with mercury to lose significant quantities of halogen back to the gas phase. This is why the inventors refer to the present invention and process as Dynamic Halogenation. This design maximizes the residence time available for the halogen-containingcompound 24 to be adsorbed onto thesorbent 14 surface prior to thesorbent 14 being injected into the flue gas flue(s), the injection locations being generally designated 28. This process maximizes the benefit and utilization of the halogen-containingreagent 24 by placing it exactly where it is needed to facilitate elemental mercury removal—on the surface of thesorbent 14. Thesorbent 14 particles with their loading of adsorbed halogen-containingreagent 24 enter the flue gas flue(s)injection locations 28 with high reactivity for the removal of elemental mercury. - The present invention is advantageous to the approaches of the prior art. The removal of elemental mercury from coal combustion gases generated by electric utility plants through the application of a conventional PAC injection process is very expensive. The present invention promises to significantly reduce the cost of mercury removal at coal-fired electric plants. First, the process provides the benefits, in terms of reactivity with elemental mercury, of replacing an expensive, pretreated PAC sorbent (e.g., iodine-impregnated PAC) with a conventional, low-cost sorbent.
- The present invention is an improvement over Felsvang et al. (U.S. Pat. No. 5,435,980) because the present invention makes much more efficient use of the halogen-containing
reagent 24 by placing it onto thecarbon sorbent 14 surface just prior to injection into the flue gases. In the transport line, the sorbent does not have to compete with the alkaline fly ash or SDA lime slurry for the available halogen gas. It has been found by the inventors, and by several other investigators, that the addition of hydrogen chloride gas to the flue gases separately of the PAC injection system, as taught by Felsvang et al., does not significantly improve the elemental mercury removal performance of the PAC injection process. This is due to the fact that much of the injected hydrogen chloride reacts with other flue gas constituents (e.g., calcium compounds contained in the coal fly ash particles), thereby preventing the halogen from adsorbing onto the sorbent and thereby enhancing the performance of the injected PAC. By making efficient use of the halogen-containingreagent 24, the present invention permits much lower addition rates for the halogen-containingreagent 24 relative to other methods for halogen addition. The present invention also has a significant advantage over other means of adding halogen-containingcompounds 24 to the flue gases in that the boiler and other power plant components are not subjected to the corrosive nature of the halogen compounds. This is especially true when compared to the addition of halogens to the boiler combustion chamber. High-temperature corrosion of boiler components by chlorides is a well-known and serious concern. - The present invention was tested in a 5 million Btu/hr Small Boiler Simulator (SBS) Facility. The SBS was fired at approximately 4.3 million Btu/hr with a western U.S. subbituminous coal. During these tests flue gases exiting the SBS boiler first passed through a spray dryer absorber (SDA) for removal of sulfur dioxide, and then through a fabric filter (FF) for removal of fly ash and spent sorbent from the SDA system.
- A stream of Dynamically Halogenated PAC, prepared by the method of the present invention, was injected into the flue gas stream downstream of the SDA, and upstream of the fabric filter. Hydrogen bromide (HBr), hydrogen chloride and chlorine gases were each examined. All were effective, but HBr was most effective. The halogen-containing
reagent 24, and a commercially-produced PAC were used as thecarbonaceous sorbent 14.FIG. 3 illustrates the removal of mercury across the SDA/FF system during operation of the Dynamic Halogenation process with HBr. It can be seen that upon injection of the Dynamically Halogenated PAC, the vapor-phase mercury exiting the system dropped from its initial value of approximately 6 μg/dscm to well below 1 μg/dscm. Other significant observations included: 1) PAC injection, alone, at a similar injection rate provided no discernable mercury removal; 2) the use of hydrogen bromide was more effective than the use of hydrogen chloride; and 3) the rates of addition of both the hydrogen bromide and PAC were many times lower than the rates for other halogen addition processes and conventional PAC injection processes, respectively. Conventional PAC injection can require 10 pounds of PAC or more per million cubic feet of flue gas to achieve 90% control of mercury compared to 0.6 pound per million cubic feet of flue gas utilizing the subject invention. The amount of halogen gas required to affect this improvement is on the order of a thousand times less than what would be required by direct injection of halogen gas directly into the flue or SDA. These results indicate that the present invention offers a very cost-effective method of removing elemental mercury from coal combustion flue gases. Based upon the testing conducted, it is believed that desired levels of mercury removal will be achieved by providing (using terms commonly used in the power generation industry)halogen containing reagent 24 at a rate equivalent to up to about 4 moles of halogen per million moles of flue gas, and by providing at least about 0.1 pounds ofsorbent 14 per million cubic feet of flue gas. - In the preferred embodiment illustrated in
FIG. 2 , the halogen-containingreagent 24 is either hydrogen bromide or bromine (Br2), and thecarbonaceous sorbent 14 and halogen-containingreagent 24 are brought together in the sorbent pneumatic transport line with sufficient residence time for the halogen-containingreagent 24 to be adsorbed onto thecarbonaceous sorbent 14 particle before thesorbent 14 is injected into the coal combustion flue gas stream. Based upon the testing conducted, it is estimated that a residence time of about 0.5 to about 1.0 second was achieved. - In yet another embodiment the coal-fired boiler fuel may include bituminous, subbituminous, and lignite coals and blends, thereof. The present invention is not limited to applications where coal is being combusted. It may also be applied to any type of combustion process where mercury emissions are to be controlled, such as in connection with combustion processes involving the combustion of municipal solid waste in incineration plants.
- In yet another embodiment, the bromine-containing
reagent 24 could comprise hydrogen bromide gas (HBr) or bromine (Br2). - In yet another embodiment, the halogen-containing
gases 24 may include any one or more of the following: hydrogen chloride, chlorine (Cl2), as well as compounds of fluorine and iodine, and halide derivatives thereof. - In yet another embodiment, the
carbonaceous sorbents 14 may include, but are not limited to, powdered activated carbon (PAC), carbons and chars produced from coal and other organic materials, and unburned carbon produced by the combustion process itself. - In yet another embodiment, the electric utility plant configurations may include plants equipped with only a particulate collector (FF or ESP) (
FIG. 4 ); an SDA FGD and a particulate collector (FF or ESP) (FIG. 5 ); or a particulate collector (FF or ESP) and a wet FGD (FIG. 6 ). - In yet another embodiment, the spent carbonaceous sorbent can be removed separately from the coal fly ash, if desired, by adding an additional particulate collector designed specifically to capture the injected quantity of carbonaceous sorbent.
- The present invention takes advantage of the ability to dynamically halogenate the
carbonaceous sorbent 14 on site, at the coal-fired utility plant, as needed, thus avoiding any elaborate off-site manufacturing processes. Conventional pneumatic transport equipment can be used, and the mixing of the stream ofhalogen containing reagent 24 and the stream ofcarbonaceous sorbent 14 can take place at typical ambient conditions for such equipment at a power plant site; e.g. from about 0 C. to about 50 C. In so far as thespecific injection locations 28 where the combined stream of halogen reagent and carbonaceous sorbent may be injected into the mercury-containing flue gas, various locations will suffice. One such location could be into the flue gas stream just downstream (with respect to a direction of flue gas flow through the installation) of the air heaters conventionally used on such power plants, i.e., atlocation 28A as illustrated inFIGS. 4, 5 and 6, where the flue gas temperature is typically about 150 C., but the flue gas temperature atsuch location 28A could be up to about 175 C. or as low as about 120 C. Another such location could be into the flue gas stream at alocation 28B as illustrated inFIG. 5 , which is just upstream of the particulate collector devices (FF or ESP), but downstream of the SDA apparatus. - While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, those skilled in the art will appreciate that changes may be made in the form of the invention covered by the following claims without departing from such principles. For example, the present invention may be applied to new fossil-fueled boiler construction which requires removal of mercury from flue gases produced thereby, or to the replacement, repair or modification of existing fossil-fueled boiler installations. The present invention may also be applied, as described earlier, to new incinerators for the combustion of MSW, or to the replacement, repair or modification of existing incinerators. In some embodiments of the invention, certain features of the invention may sometimes be used to advantage without a corresponding use of the other features. Accordingly, there are other alternative embodiments which would be apparent to those skilled in the art and based on the teachings of the present invention, and which are intended to be included within the scope and equivalents of the following claims of this invention.
Claims (13)
Priority Applications (1)
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US10/591,856 US20070180990A1 (en) | 2004-03-22 | 2005-03-21 | Dynamic halogenation of sorbents for the removal of mercury from flue gases |
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PCT/US2005/009441 WO2005092476A1 (en) | 2004-03-22 | 2005-03-21 | Dynamic halogenation of sorbents for the removal of mercury from flue gases |
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CN (1) | CN100473447C (en) |
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CA (1) | CA2557159C (en) |
TW (1) | TWI265820B (en) |
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Cited By (85)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070051239A1 (en) * | 2005-09-07 | 2007-03-08 | Holmes Michael J | High energy dissociation for mercury control systems |
WO2009087447A1 (en) * | 2007-12-21 | 2009-07-16 | Alstom Technology Ltd | Method of reducing an amount of mercury in a flue gas |
GB2457781A (en) * | 2008-02-26 | 2009-09-02 | Gen Electric | Method and system for reducing mercury emissions in flue gas |
US20100071262A1 (en) * | 2008-09-19 | 2010-03-25 | Greatpoint Energy, Inc. | Processes for Gasification of a Carbonaceous Feedstock |
US20100139482A1 (en) * | 2005-03-17 | 2010-06-10 | Comrie Douglas C | Reducing mercury emissions from the burning of coal |
US20100263577A1 (en) * | 2009-04-21 | 2010-10-21 | Industrial Accessories Company | Pollution abatement process for fossil fuel-fired boilers |
US7897126B2 (en) | 2007-12-28 | 2011-03-01 | Greatpoint Energy, Inc. | Catalytic gasification process with recovery of alkali metal from char |
US7901644B2 (en) | 2007-12-28 | 2011-03-08 | Greatpoint Energy, Inc. | Catalytic gasification process with recovery of alkali metal from char |
US20110064648A1 (en) * | 2009-09-16 | 2011-03-17 | Greatpoint Energy, Inc. | Two-mode process for hydrogen production |
US7922782B2 (en) | 2006-06-01 | 2011-04-12 | Greatpoint Energy, Inc. | Catalytic steam gasification process with recovery and recycle of alkali metal compounds |
US7926750B2 (en) | 2008-02-29 | 2011-04-19 | Greatpoint Energy, Inc. | Compactor feeder |
US8057576B1 (en) | 2008-06-10 | 2011-11-15 | Calgon Carbon Corporation | Enhanced adsorbents and methods for mercury removal |
US8114176B2 (en) | 2005-10-12 | 2012-02-14 | Great Point Energy, Inc. | Catalytic steam gasification of petroleum coke to methane |
US8114177B2 (en) | 2008-02-29 | 2012-02-14 | Greatpoint Energy, Inc. | Co-feed of biomass as source of makeup catalysts for catalytic coal gasification |
WO2011127323A3 (en) * | 2010-04-07 | 2012-02-23 | Calgon Carbon Corporation | Methods for removal of mercury from flue gas |
US8123827B2 (en) | 2007-12-28 | 2012-02-28 | Greatpoint Energy, Inc. | Processes for making syngas-derived products |
US8124036B1 (en) | 2005-10-27 | 2012-02-28 | ADA-ES, Inc. | Additives for mercury oxidation in coal-fired power plants |
US8163048B2 (en) | 2007-08-02 | 2012-04-24 | Greatpoint Energy, Inc. | Catalyst-loaded coal compositions, methods of making and use |
US8192716B2 (en) | 2008-04-01 | 2012-06-05 | Greatpoint Energy, Inc. | Sour shift process for the removal of carbon monoxide from a gas stream |
US8202913B2 (en) | 2008-10-23 | 2012-06-19 | Greatpoint Energy, Inc. | Processes for gasification of a carbonaceous feedstock |
US8226913B2 (en) | 2005-03-17 | 2012-07-24 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US8268899B2 (en) | 2009-05-13 | 2012-09-18 | Greatpoint Energy, Inc. | Processes for hydromethanation of a carbonaceous feedstock |
US8286901B2 (en) | 2008-02-29 | 2012-10-16 | Greatpoint Energy, Inc. | Coal compositions for catalytic gasification |
US8297542B2 (en) | 2008-02-29 | 2012-10-30 | Greatpoint Energy, Inc. | Coal compositions for catalytic gasification |
US8312822B2 (en) | 2007-07-02 | 2012-11-20 | Energy & Environmental Research Center Foundation | Mercury control using moderate-temperature dissociation of halogen compounds |
WO2012163450A1 (en) * | 2011-06-01 | 2012-12-06 | Rheinbraun Brennstoff Gmbh | Method for precipitating mercury from flue gases of high-temperature plants |
US8328890B2 (en) | 2008-09-19 | 2012-12-11 | Greatpoint Energy, Inc. | Processes for gasification of a carbonaceous feedstock |
US8349039B2 (en) | 2008-02-29 | 2013-01-08 | Greatpoint Energy, Inc. | Carbonaceous fines recycle |
US8361428B2 (en) | 2008-02-29 | 2013-01-29 | Greatpoint Energy, Inc. | Reduced carbon footprint steam generation processes |
US8366795B2 (en) | 2008-02-29 | 2013-02-05 | Greatpoint Energy, Inc. | Catalytic gasification particulate compositions |
US8372362B2 (en) | 2010-02-04 | 2013-02-12 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US8383071B2 (en) | 2010-03-10 | 2013-02-26 | Ada Environmental Solutions, Llc | Process for dilute phase injection of dry alkaline materials |
US8479833B2 (en) | 2009-10-19 | 2013-07-09 | Greatpoint Energy, Inc. | Integrated enhanced oil recovery process |
US8479834B2 (en) | 2009-10-19 | 2013-07-09 | Greatpoint Energy, Inc. | Integrated enhanced oil recovery process |
US8496894B2 (en) | 2010-02-04 | 2013-07-30 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US8502007B2 (en) | 2008-09-19 | 2013-08-06 | Greatpoint Energy, Inc. | Char methanation catalyst and its use in gasification processes |
US8524179B2 (en) | 2010-10-25 | 2013-09-03 | ADA-ES, Inc. | Hot-side method and system |
US8557878B2 (en) | 2010-04-26 | 2013-10-15 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock with vanadium recovery |
US8648121B2 (en) | 2011-02-23 | 2014-02-11 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock with nickel recovery |
US8652222B2 (en) | 2008-02-29 | 2014-02-18 | Greatpoint Energy, Inc. | Biomass compositions for catalytic gasification |
US8653149B2 (en) | 2010-05-28 | 2014-02-18 | Greatpoint Energy, Inc. | Conversion of liquid heavy hydrocarbon feedstocks to gaseous products |
US8652696B2 (en) | 2010-03-08 | 2014-02-18 | Greatpoint Energy, Inc. | Integrated hydromethanation fuel cell power generation |
US8669013B2 (en) | 2010-02-23 | 2014-03-11 | Greatpoint Energy, Inc. | Integrated hydromethanation fuel cell power generation |
US8709113B2 (en) | 2008-02-29 | 2014-04-29 | Greatpoint Energy, Inc. | Steam generation processes utilizing biomass feedstocks |
US8728183B2 (en) | 2009-05-13 | 2014-05-20 | Greatpoint Energy, Inc. | Processes for hydromethanation of a carbonaceous feedstock |
US8728182B2 (en) | 2009-05-13 | 2014-05-20 | Greatpoint Energy, Inc. | Processes for hydromethanation of a carbonaceous feedstock |
US8733459B2 (en) | 2009-12-17 | 2014-05-27 | Greatpoint Energy, Inc. | Integrated enhanced oil recovery process |
US8734548B2 (en) | 2008-12-30 | 2014-05-27 | Greatpoint Energy, Inc. | Processes for preparing a catalyzed coal particulate |
US8734547B2 (en) | 2008-12-30 | 2014-05-27 | Greatpoint Energy, Inc. | Processes for preparing a catalyzed carbonaceous particulate |
US8748687B2 (en) | 2010-08-18 | 2014-06-10 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
US8784757B2 (en) | 2010-03-10 | 2014-07-22 | ADA-ES, Inc. | Air treatment process for dilute phase injection of dry alkaline materials |
US8871007B2 (en) | 2010-05-04 | 2014-10-28 | Albemarle Corporation | Reduction of mercury emissions from cement plants |
US8883099B2 (en) | 2012-04-11 | 2014-11-11 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
US8951487B2 (en) | 2010-10-25 | 2015-02-10 | ADA-ES, Inc. | Hot-side method and system |
US8961654B2 (en) | 2010-12-17 | 2015-02-24 | Albemarle Corporation | Reduction of mercury emissions from cement plants |
US8974756B2 (en) | 2012-07-25 | 2015-03-10 | ADA-ES, Inc. | Process to enhance mixing of dry sorbents and flue gas for air pollution control |
US8999020B2 (en) | 2008-04-01 | 2015-04-07 | Greatpoint Energy, Inc. | Processes for the separation of methane from a gas stream |
US9012524B2 (en) | 2011-10-06 | 2015-04-21 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
US9017452B2 (en) | 2011-11-14 | 2015-04-28 | ADA-ES, Inc. | System and method for dense phase sorbent injection |
US9034061B2 (en) | 2012-10-01 | 2015-05-19 | Greatpoint Energy, Inc. | Agglomerated particulate low-rank coal feedstock and uses thereof |
US9034058B2 (en) | 2012-10-01 | 2015-05-19 | Greatpoint Energy, Inc. | Agglomerated particulate low-rank coal feedstock and uses thereof |
US20150246315A1 (en) * | 2004-08-30 | 2015-09-03 | Energy & Environmental Research Center Foundation | Sorbents for the oxidation and removal of mercury |
US9127221B2 (en) | 2011-06-03 | 2015-09-08 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
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US9234149B2 (en) | 2007-12-28 | 2016-01-12 | Greatpoint Energy, Inc. | Steam generating slurry gasifier for the catalytic gasification of a carbonaceous feedstock |
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US9273260B2 (en) | 2012-10-01 | 2016-03-01 | Greatpoint Energy, Inc. | Agglomerated particulate low-rank coal feedstock and uses thereof |
US9328920B2 (en) | 2012-10-01 | 2016-05-03 | Greatpoint Energy, Inc. | Use of contaminated low-rank coal for combustion |
US9353322B2 (en) | 2010-11-01 | 2016-05-31 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
US10143963B2 (en) * | 2015-02-09 | 2018-12-04 | North China Electric Power University | Mercury removal system for coal-fired power plant |
US10220369B2 (en) | 2015-08-11 | 2019-03-05 | Calgon Carbon Corporation | Enhanced sorbent formulation for removal of mercury from flue gas |
US10344231B1 (en) | 2018-10-26 | 2019-07-09 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock with improved carbon utilization |
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US10767130B2 (en) | 2012-08-10 | 2020-09-08 | ADA-ES, Inc. | Method and additive for controlling nitrogen oxide emissions |
US10828596B2 (en) | 2003-04-23 | 2020-11-10 | Midwest Energy Emissions Corp. | Promoted ammonium salt-protected activated carbon sorbent particles for removal of mercury from gas streams |
US11179673B2 (en) | 2003-04-23 | 2021-11-23 | Midwwest Energy Emission Corp. | Sorbents for the oxidation and removal of mercury |
US11298657B2 (en) | 2010-10-25 | 2022-04-12 | ADA-ES, Inc. | Hot-side method and system |
US11857942B2 (en) | 2012-06-11 | 2024-01-02 | Calgon Carbon Corporation | Sorbents for removal of mercury |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PT2826540T (en) * | 2006-11-22 | 2018-09-28 | Albemarle Corp | Activated carbon based composition to sequester flue gas mercury in concrete |
KR100827767B1 (en) | 2007-02-13 | 2008-05-08 | 연세대학교 산학협력단 | An apparatus for mercury collection in vehicle |
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US8404038B2 (en) * | 2007-11-23 | 2013-03-26 | Albemrle Corporation | Compositions and methods to sequester flue gas mercury in concrete |
CA2658469C (en) | 2008-10-03 | 2012-08-14 | Rajender P. Gupta | Bromination process |
UA109399C2 (en) | 2009-04-01 | 2015-08-25 | THERMALLY ACTIVATED COAL RESISTANT TO SELF-IGNITION | |
DE102009057432A1 (en) * | 2009-12-09 | 2011-06-16 | Rheinbraun Brennstoff Gmbh | Process for the separation of mercury from flue gases of high-temperature plants |
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TWI619550B (en) * | 2013-03-15 | 2018-04-01 | 亞比馬利股份有限公司 | Flue gas sorbents, methods for their manufacture, and their use in removal of mercury from gaseous streams |
CN106178830B (en) * | 2016-07-29 | 2018-11-02 | 华中科技大学 | A kind of method that can activate and spray demercuration adsorbent online simultaneously |
CN106178831B (en) * | 2016-08-01 | 2018-11-02 | 华中科技大学 | A kind of activation of adsorbent and injection demercuration integral method |
CN106178834B (en) * | 2016-08-26 | 2018-02-27 | 福建龙净环保股份有限公司 | Active carbon powder injection apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6514907B2 (en) * | 1997-07-25 | 2003-02-04 | Takeda Chemical Industries, Ltd. | Bromine-impregnated activated carbon and process for preparing the same |
US6953494B2 (en) * | 2002-05-06 | 2005-10-11 | Nelson Jr Sidney G | Sorbents and methods for the removal of mercury from combustion gases |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7202959A (en) * | 1972-03-06 | 1972-05-25 | ||
JPS4953593A (en) * | 1972-09-29 | 1974-05-24 | ||
NL7710632A (en) * | 1977-09-29 | 1979-04-02 | Akzo Nv | PROCESS FOR THE REMOVAL OF MERCURY FROM GASES CONTAINING MERCURY VAPOR. |
DK158376C (en) * | 1986-07-16 | 1990-10-08 | Niro Atomizer As | METHOD OF REDUCING THE CONTENT OF MERCURY Vapor AND / OR VAPORS OF Harmful Organic Compounds And / Or Nitrogen Oxides In Combustion Plant |
DE4026071C2 (en) * | 1990-08-17 | 1994-04-14 | Steag Ag | Method and device for regenerating carbonaceous adsorbent |
US5435980A (en) * | 1991-11-04 | 1995-07-25 | Niro A/S | Method of improving the Hg-removing capability of a flue gas cleaning process |
JP3332204B2 (en) * | 1997-01-31 | 2002-10-07 | 日本鋼管株式会社 | Method and apparatus for removing harmful substances from exhaust gas |
JP3935547B2 (en) * | 1997-02-19 | 2007-06-27 | 三菱重工業株式会社 | Exhaust gas treatment method and exhaust gas treatment apparatus |
US6589318B2 (en) * | 1999-09-29 | 2003-07-08 | Merck & Co., Inc. | Adsorption powder for removing mercury from high temperature, high moisture gas streams |
-
2005
- 2005-03-21 TW TW094108659A patent/TWI265820B/en not_active IP Right Cessation
- 2005-03-21 US US10/591,856 patent/US20070180990A1/en not_active Abandoned
- 2005-03-21 CN CNB2005800089508A patent/CN100473447C/en not_active Expired - Fee Related
- 2005-03-21 AU AU2005225449A patent/AU2005225449A1/en not_active Abandoned
- 2005-03-21 EP EP05729582A patent/EP1737556A4/en not_active Withdrawn
- 2005-03-21 KR KR1020067021622A patent/KR101243539B1/en not_active IP Right Cessation
- 2005-03-21 WO PCT/US2005/009441 patent/WO2005092476A1/en active Application Filing
- 2005-03-21 CA CA2557159A patent/CA2557159C/en not_active Expired - Fee Related
- 2005-03-21 JP JP2007505083A patent/JP2007530255A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6514907B2 (en) * | 1997-07-25 | 2003-02-04 | Takeda Chemical Industries, Ltd. | Bromine-impregnated activated carbon and process for preparing the same |
US6953494B2 (en) * | 2002-05-06 | 2005-10-11 | Nelson Jr Sidney G | Sorbents and methods for the removal of mercury from combustion gases |
Cited By (155)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11806665B2 (en) | 2003-04-23 | 2023-11-07 | Midwwest Energy Emissions Corp. | Sorbents for the oxidation and removal of mercury |
US11179673B2 (en) | 2003-04-23 | 2021-11-23 | Midwwest Energy Emission Corp. | Sorbents for the oxidation and removal of mercury |
US10828596B2 (en) | 2003-04-23 | 2020-11-10 | Midwest Energy Emissions Corp. | Promoted ammonium salt-protected activated carbon sorbent particles for removal of mercury from gas streams |
US20190329215A1 (en) * | 2004-08-30 | 2019-10-31 | Midwest Energy Emissions Corp | Sorbents for the oxidation and removal of mercury |
US20180257030A1 (en) * | 2004-08-30 | 2018-09-13 | Midwest Energy Emissions Corp | Sorbents for the oxidation and removal of mercury |
US20180280870A1 (en) * | 2004-08-30 | 2018-10-04 | Midwest Energy Emissions Corp | Sorbents for the oxidation and removal of mercury |
US10343114B2 (en) * | 2004-08-30 | 2019-07-09 | Midwest Energy Emissions Corp | Sorbents for the oxidation and removal of mercury |
US20190329179A1 (en) * | 2004-08-30 | 2019-10-31 | Midwest Energy Emissions Corp | Treatment of coal with mercury control additives |
US10933370B2 (en) * | 2004-08-30 | 2021-03-02 | Midwest Energy Emissions Corp | Sorbents for the oxidation and removal of mercury |
US20190336913A1 (en) * | 2004-08-30 | 2019-11-07 | Edwin S. Olson | Sorbents for the oxidation and removal of mercury |
US10589225B2 (en) * | 2004-08-30 | 2020-03-17 | Midwest Energy Emissions Corp. | Sorbents for the oxidation and removal of mercury |
US10596517B2 (en) * | 2004-08-30 | 2020-03-24 | Midwest Energy Emissions Corp. | Sorbents for the oxidation and removal of mercury |
US10668430B2 (en) * | 2004-08-30 | 2020-06-02 | Midwest Energy Emissions Corp. | Sorbents for the oxidation and removal of mercury |
US20180229182A1 (en) * | 2004-08-30 | 2018-08-16 | Midwest Energy Emissions Corp | Sorbents for the oxidation and removal of mercury |
US10926218B2 (en) * | 2004-08-30 | 2021-02-23 | Midwest Energy Emissions Corp | Sorbents for the oxidation and removal of mercury |
US20150246315A1 (en) * | 2004-08-30 | 2015-09-03 | Energy & Environmental Research Center Foundation | Sorbents for the oxidation and removal of mercury |
US7988939B2 (en) | 2005-03-17 | 2011-08-02 | NOx II Ltd. | Sorbents for coal combustion |
US8920158B2 (en) | 2005-03-17 | 2014-12-30 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US9169453B2 (en) | 2005-03-17 | 2015-10-27 | Nox Ii, Ltd. | Sorbents for coal combustion |
US9416967B2 (en) | 2005-03-17 | 2016-08-16 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US10962224B2 (en) | 2005-03-17 | 2021-03-30 | Nox Ii, Ltd. | Sorbents for coal combustion |
US8703081B2 (en) | 2005-03-17 | 2014-04-22 | Nox Ii, Ltd. | Sorbents for coal combustion |
US9702554B2 (en) | 2005-03-17 | 2017-07-11 | Nox Ii, Ltd. | Sorbents for coal combustion |
US11060723B2 (en) | 2005-03-17 | 2021-07-13 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal by remote sorbent addition |
US8545778B2 (en) | 2005-03-17 | 2013-10-01 | Nox Ii, Ltd. | Sorbents for coal combustion |
US9822973B2 (en) | 2005-03-17 | 2017-11-21 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US11732889B2 (en) | 2005-03-17 | 2023-08-22 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal by remote sorbent addition |
US8226913B2 (en) | 2005-03-17 | 2012-07-24 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US20100323308A1 (en) * | 2005-03-17 | 2010-12-23 | Comrie Douglas C | Sorbents for coal combustion |
US9945557B2 (en) | 2005-03-17 | 2018-04-17 | Nox Ii, Ltd. | Sorbents for coal combustion |
US8501128B2 (en) | 2005-03-17 | 2013-08-06 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US8658115B2 (en) | 2005-03-17 | 2014-02-25 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US10641483B2 (en) | 2005-03-17 | 2020-05-05 | Nox Ii, Ltd. | Sorbents for coal combustion |
US10612779B2 (en) | 2005-03-17 | 2020-04-07 | Nox Ii, Ltd. | Sorbents for coal combustion |
US20100139482A1 (en) * | 2005-03-17 | 2010-06-10 | Comrie Douglas C | Reducing mercury emissions from the burning of coal |
US10359192B2 (en) | 2005-03-17 | 2019-07-23 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US10670265B2 (en) | 2005-03-17 | 2020-06-02 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US7776301B2 (en) | 2005-03-17 | 2010-08-17 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
US8114368B2 (en) | 2005-03-17 | 2012-02-14 | Nox Ii, Ltd. | Sorbents for coal combustion |
US11732888B2 (en) | 2005-03-17 | 2023-08-22 | Nox Ii, Ltd. | Sorbents for coal combustion |
US20070051239A1 (en) * | 2005-09-07 | 2007-03-08 | Holmes Michael J | High energy dissociation for mercury control systems |
US7615101B2 (en) * | 2005-09-07 | 2009-11-10 | Energy & Environmental Research Foundation | High energy dissociation for mercury control systems |
US8114176B2 (en) | 2005-10-12 | 2012-02-14 | Great Point Energy, Inc. | Catalytic steam gasification of petroleum coke to methane |
US8293196B1 (en) | 2005-10-27 | 2012-10-23 | ADA-ES, Inc. | Additives for mercury oxidation in coal-fired power plants |
US8124036B1 (en) | 2005-10-27 | 2012-02-28 | ADA-ES, Inc. | Additives for mercury oxidation in coal-fired power plants |
US8409330B2 (en) | 2006-03-29 | 2013-04-02 | Calgon Carbon Corporation | Enhanced adsorbents and methods for mercury removal |
US7922782B2 (en) | 2006-06-01 | 2011-04-12 | Greatpoint Energy, Inc. | Catalytic steam gasification process with recovery and recycle of alkali metal compounds |
US9155997B2 (en) | 2007-07-02 | 2015-10-13 | Energy & Environmental Research Center Foundation | Mercury control using moderate-temperature dissociation of halogen compounds |
US8312822B2 (en) | 2007-07-02 | 2012-11-20 | Energy & Environmental Research Center Foundation | Mercury control using moderate-temperature dissociation of halogen compounds |
US8163048B2 (en) | 2007-08-02 | 2012-04-24 | Greatpoint Energy, Inc. | Catalyst-loaded coal compositions, methods of making and use |
WO2009087447A1 (en) * | 2007-12-21 | 2009-07-16 | Alstom Technology Ltd | Method of reducing an amount of mercury in a flue gas |
US8277545B2 (en) | 2007-12-21 | 2012-10-02 | Alstom Technology Ltd | Method of reducing an amount of mercury in a flue gas |
US20100258006A1 (en) * | 2007-12-21 | 2010-10-14 | Lindau Leif A V | Method of Reducing an Amount of Mercury in a Flue Gas |
US7766997B2 (en) | 2007-12-21 | 2010-08-03 | Alstom Technology Ltd | Method of reducing an amount of mercury in a flue gas |
US8123827B2 (en) | 2007-12-28 | 2012-02-28 | Greatpoint Energy, Inc. | Processes for making syngas-derived products |
US9234149B2 (en) | 2007-12-28 | 2016-01-12 | Greatpoint Energy, Inc. | Steam generating slurry gasifier for the catalytic gasification of a carbonaceous feedstock |
US7897126B2 (en) | 2007-12-28 | 2011-03-01 | Greatpoint Energy, Inc. | Catalytic gasification process with recovery of alkali metal from char |
US7901644B2 (en) | 2007-12-28 | 2011-03-08 | Greatpoint Energy, Inc. | Catalytic gasification process with recovery of alkali metal from char |
GB2457781B (en) * | 2008-02-26 | 2013-01-02 | Gen Electric | Method and system for reducing mercury emissions in flue gas |
GB2457781A (en) * | 2008-02-26 | 2009-09-02 | Gen Electric | Method and system for reducing mercury emissions in flue gas |
US8349039B2 (en) | 2008-02-29 | 2013-01-08 | Greatpoint Energy, Inc. | Carbonaceous fines recycle |
US8297542B2 (en) | 2008-02-29 | 2012-10-30 | Greatpoint Energy, Inc. | Coal compositions for catalytic gasification |
US8709113B2 (en) | 2008-02-29 | 2014-04-29 | Greatpoint Energy, Inc. | Steam generation processes utilizing biomass feedstocks |
US8366795B2 (en) | 2008-02-29 | 2013-02-05 | Greatpoint Energy, Inc. | Catalytic gasification particulate compositions |
US8361428B2 (en) | 2008-02-29 | 2013-01-29 | Greatpoint Energy, Inc. | Reduced carbon footprint steam generation processes |
US8652222B2 (en) | 2008-02-29 | 2014-02-18 | Greatpoint Energy, Inc. | Biomass compositions for catalytic gasification |
US8286901B2 (en) | 2008-02-29 | 2012-10-16 | Greatpoint Energy, Inc. | Coal compositions for catalytic gasification |
US8114177B2 (en) | 2008-02-29 | 2012-02-14 | Greatpoint Energy, Inc. | Co-feed of biomass as source of makeup catalysts for catalytic coal gasification |
US7926750B2 (en) | 2008-02-29 | 2011-04-19 | Greatpoint Energy, Inc. | Compactor feeder |
US8192716B2 (en) | 2008-04-01 | 2012-06-05 | Greatpoint Energy, Inc. | Sour shift process for the removal of carbon monoxide from a gas stream |
US8999020B2 (en) | 2008-04-01 | 2015-04-07 | Greatpoint Energy, Inc. | Processes for the separation of methane from a gas stream |
US8834606B2 (en) | 2008-06-10 | 2014-09-16 | Calgon Carbon Corporation | Enhanced adsorbents and methods for mercury removal |
US8057576B1 (en) | 2008-06-10 | 2011-11-15 | Calgon Carbon Corporation | Enhanced adsorbents and methods for mercury removal |
US20100071262A1 (en) * | 2008-09-19 | 2010-03-25 | Greatpoint Energy, Inc. | Processes for Gasification of a Carbonaceous Feedstock |
US8647402B2 (en) | 2008-09-19 | 2014-02-11 | Greatpoint Energy, Inc. | Processes for gasification of a carbonaceous feedstock |
US8502007B2 (en) | 2008-09-19 | 2013-08-06 | Greatpoint Energy, Inc. | Char methanation catalyst and its use in gasification processes |
US8328890B2 (en) | 2008-09-19 | 2012-12-11 | Greatpoint Energy, Inc. | Processes for gasification of a carbonaceous feedstock |
US8202913B2 (en) | 2008-10-23 | 2012-06-19 | Greatpoint Energy, Inc. | Processes for gasification of a carbonaceous feedstock |
US8734547B2 (en) | 2008-12-30 | 2014-05-27 | Greatpoint Energy, Inc. | Processes for preparing a catalyzed carbonaceous particulate |
US8734548B2 (en) | 2008-12-30 | 2014-05-27 | Greatpoint Energy, Inc. | Processes for preparing a catalyzed coal particulate |
US20100263577A1 (en) * | 2009-04-21 | 2010-10-21 | Industrial Accessories Company | Pollution abatement process for fossil fuel-fired boilers |
US8268899B2 (en) | 2009-05-13 | 2012-09-18 | Greatpoint Energy, Inc. | Processes for hydromethanation of a carbonaceous feedstock |
US8728182B2 (en) | 2009-05-13 | 2014-05-20 | Greatpoint Energy, Inc. | Processes for hydromethanation of a carbonaceous feedstock |
US8728183B2 (en) | 2009-05-13 | 2014-05-20 | Greatpoint Energy, Inc. | Processes for hydromethanation of a carbonaceous feedstock |
US20110064648A1 (en) * | 2009-09-16 | 2011-03-17 | Greatpoint Energy, Inc. | Two-mode process for hydrogen production |
US8479833B2 (en) | 2009-10-19 | 2013-07-09 | Greatpoint Energy, Inc. | Integrated enhanced oil recovery process |
US8479834B2 (en) | 2009-10-19 | 2013-07-09 | Greatpoint Energy, Inc. | Integrated enhanced oil recovery process |
US8733459B2 (en) | 2009-12-17 | 2014-05-27 | Greatpoint Energy, Inc. | Integrated enhanced oil recovery process |
US9352275B2 (en) | 2010-02-04 | 2016-05-31 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US9221013B2 (en) | 2010-02-04 | 2015-12-29 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US10427096B2 (en) | 2010-02-04 | 2019-10-01 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US11213787B2 (en) | 2010-02-04 | 2022-01-04 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US10843130B2 (en) | 2010-02-04 | 2020-11-24 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US9884286B2 (en) | 2010-02-04 | 2018-02-06 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US8372362B2 (en) | 2010-02-04 | 2013-02-12 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US8496894B2 (en) | 2010-02-04 | 2013-07-30 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
US8669013B2 (en) | 2010-02-23 | 2014-03-11 | Greatpoint Energy, Inc. | Integrated hydromethanation fuel cell power generation |
US8652696B2 (en) | 2010-03-08 | 2014-02-18 | Greatpoint Energy, Inc. | Integrated hydromethanation fuel cell power generation |
US8784757B2 (en) | 2010-03-10 | 2014-07-22 | ADA-ES, Inc. | Air treatment process for dilute phase injection of dry alkaline materials |
US8383071B2 (en) | 2010-03-10 | 2013-02-26 | Ada Environmental Solutions, Llc | Process for dilute phase injection of dry alkaline materials |
US9149759B2 (en) | 2010-03-10 | 2015-10-06 | ADA-ES, Inc. | Air treatment process for dilute phase injection of dry alkaline materials |
US8679430B2 (en) | 2010-04-07 | 2014-03-25 | Calgon Carbon Corporation | Methods for removal of mercury from flue gas |
US9068745B2 (en) | 2010-04-07 | 2015-06-30 | Calgon Carbon Corporation | Methods for removal of mercury from flue gas |
WO2011127323A3 (en) * | 2010-04-07 | 2012-02-23 | Calgon Carbon Corporation | Methods for removal of mercury from flue gas |
CN103068464A (en) * | 2010-04-07 | 2013-04-24 | 卡尔冈碳素公司 | Methods for removal of mercury from flue gas |
US8309046B2 (en) | 2010-04-07 | 2012-11-13 | Calgon Carbon Corporation | Methods for removal of mercury from flue gas |
US8557878B2 (en) | 2010-04-26 | 2013-10-15 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock with vanadium recovery |
US8871007B2 (en) | 2010-05-04 | 2014-10-28 | Albemarle Corporation | Reduction of mercury emissions from cement plants |
US8653149B2 (en) | 2010-05-28 | 2014-02-18 | Greatpoint Energy, Inc. | Conversion of liquid heavy hydrocarbon feedstocks to gaseous products |
US8748687B2 (en) | 2010-08-18 | 2014-06-10 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
US10124293B2 (en) | 2010-10-25 | 2018-11-13 | ADA-ES, Inc. | Hot-side method and system |
US10730015B2 (en) | 2010-10-25 | 2020-08-04 | ADA-ES, Inc. | Hot-side method and system |
US8524179B2 (en) | 2010-10-25 | 2013-09-03 | ADA-ES, Inc. | Hot-side method and system |
US9657942B2 (en) | 2010-10-25 | 2017-05-23 | ADA-ES, Inc. | Hot-side method and system |
US11298657B2 (en) | 2010-10-25 | 2022-04-12 | ADA-ES, Inc. | Hot-side method and system |
US8951487B2 (en) | 2010-10-25 | 2015-02-10 | ADA-ES, Inc. | Hot-side method and system |
US9353322B2 (en) | 2010-11-01 | 2016-05-31 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
US8961654B2 (en) | 2010-12-17 | 2015-02-24 | Albemarle Corporation | Reduction of mercury emissions from cement plants |
US8648121B2 (en) | 2011-02-23 | 2014-02-11 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock with nickel recovery |
US10731095B2 (en) | 2011-05-13 | 2020-08-04 | ADA-ES, Inc. | Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers |
US11118127B2 (en) | 2011-05-13 | 2021-09-14 | ADA-ES, Inc. | Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers |
US10465137B2 (en) | 2011-05-13 | 2019-11-05 | Ada Es, Inc. | Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers |
WO2012163450A1 (en) * | 2011-06-01 | 2012-12-06 | Rheinbraun Brennstoff Gmbh | Method for precipitating mercury from flue gases of high-temperature plants |
US9127221B2 (en) | 2011-06-03 | 2015-09-08 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
US9012524B2 (en) | 2011-10-06 | 2015-04-21 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock |
US9017452B2 (en) | 2011-11-14 | 2015-04-28 | ADA-ES, Inc. | System and method for dense phase sorbent injection |
US9889405B2 (en) | 2012-04-11 | 2018-02-13 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
US9409123B2 (en) | 2012-04-11 | 2016-08-09 | ASA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
US11065578B2 (en) | 2012-04-11 | 2021-07-20 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
US8883099B2 (en) | 2012-04-11 | 2014-11-11 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
US10159931B2 (en) | 2012-04-11 | 2018-12-25 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
US10758863B2 (en) | 2012-04-11 | 2020-09-01 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
US11857942B2 (en) | 2012-06-11 | 2024-01-02 | Calgon Carbon Corporation | Sorbents for removal of mercury |
US8974756B2 (en) | 2012-07-25 | 2015-03-10 | ADA-ES, Inc. | Process to enhance mixing of dry sorbents and flue gas for air pollution control |
US10767130B2 (en) | 2012-08-10 | 2020-09-08 | ADA-ES, Inc. | Method and additive for controlling nitrogen oxide emissions |
US11384304B2 (en) | 2012-08-10 | 2022-07-12 | ADA-ES, Inc. | Method and additive for controlling nitrogen oxide emissions |
US9034061B2 (en) | 2012-10-01 | 2015-05-19 | Greatpoint Energy, Inc. | Agglomerated particulate low-rank coal feedstock and uses thereof |
US9034058B2 (en) | 2012-10-01 | 2015-05-19 | Greatpoint Energy, Inc. | Agglomerated particulate low-rank coal feedstock and uses thereof |
US9273260B2 (en) | 2012-10-01 | 2016-03-01 | Greatpoint Energy, Inc. | Agglomerated particulate low-rank coal feedstock and uses thereof |
US9328920B2 (en) | 2012-10-01 | 2016-05-03 | Greatpoint Energy, Inc. | Use of contaminated low-rank coal for combustion |
US9308518B2 (en) | 2013-02-14 | 2016-04-12 | Calgon Carbon Corporation | Enhanced sorbent formulation for removal of mercury from flue gas |
KR20150119906A (en) * | 2013-02-14 | 2015-10-26 | 칼곤 카본 코포레이션 | Enhanced sorbent formulation for removal of mercury from flue gas |
KR102081571B1 (en) | 2013-02-14 | 2020-02-26 | 칼곤 카본 코포레이션 | Enhanced sorbent formulation for removal of mercury from flue gas |
US10471412B2 (en) | 2013-03-06 | 2019-11-12 | Midwest Energy Emissions Corp. | Activated carbon sorbent including nitrogen and methods of using the same |
US11059028B2 (en) | 2013-03-06 | 2021-07-13 | Midwwest Energy Emissions Corp. | Activated carbon sorbent including nitrogen and methods of using the same |
US10589292B2 (en) | 2013-08-16 | 2020-03-17 | ADA-ES, Inc. | Method to reduce mercury, acid gas, and particulate emissions |
CN105311925A (en) * | 2014-06-11 | 2016-02-10 | 华北电力大学 | Large-scale adsorbent modification coupling jet system for controlling heavy metal pollutant emission in flue gas |
US11369921B2 (en) | 2014-11-25 | 2022-06-28 | ADA-ES, Inc. | Low pressure drop static mixing system |
US10350545B2 (en) | 2014-11-25 | 2019-07-16 | ADA-ES, Inc. | Low pressure drop static mixing system |
US10143963B2 (en) * | 2015-02-09 | 2018-12-04 | North China Electric Power University | Mercury removal system for coal-fired power plant |
US10220369B2 (en) | 2015-08-11 | 2019-03-05 | Calgon Carbon Corporation | Enhanced sorbent formulation for removal of mercury from flue gas |
US10464872B1 (en) | 2018-07-31 | 2019-11-05 | Greatpoint Energy, Inc. | Catalytic gasification to produce methanol |
US10344231B1 (en) | 2018-10-26 | 2019-07-09 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock with improved carbon utilization |
US10435637B1 (en) | 2018-12-18 | 2019-10-08 | Greatpoint Energy, Inc. | Hydromethanation of a carbonaceous feedstock with improved carbon utilization and power generation |
US10618818B1 (en) | 2019-03-22 | 2020-04-14 | Sure Champion Investment Limited | Catalytic gasification to produce ammonia and urea |
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